backup db in wrong volume

[Danieleinfn]

Hi,
I try to backup db in 3 volumes but tsm server uses different tape, before I give:

set dbrecovery DB_CLASS
ANR2782I SET DBRECOVERY completed successfully and device class for automatic
DB backup is set to DB_CLASS.

then:


backup db devclass=DB_CLASS type=full volumenames=EL3506,EL3508,EL3509 scratch=no
ANR2280I Full database backup started as process 5.
ANS8003I Process number 5 started.


I want to use EL3506,EL3508,EL3509 but... from console mode I see that this operation is performed on tape EL2273:

ANR2017I Administrator ADMIN issued command: BACKUP DB devclass=DB_CLASS
type=full volumenames=EL3506,EL3508,EL3509 scratch=no
ANR4559I Backup DB is in progress.
ANR0984I Process 5 for DATABASE BACKUP started in the BACKGROUND at 01:59:24
PM.
ANR2280I Full database backup started as process 5.
ANR0406I Session 61 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59709)).
ANR0511I Session 61 opened output volume EL2273.
ANR0407I Session 62 started for administrator ADMIN (Linux86) (Tcp/Ip
ds-07-10.cr.cnaf.infn.it(53535)).
ANR2017I Administrator ADMIN issued command: QUERY PATH
ANR0405I Session 62 ended for administrator ADMIN (Linux86).
ANR0514I Session 61 closed volume EL2273.
ANR0403I Session 61 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 63 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59710)).
ANR0511I Session 63 opened output volume EL2273.
ANR0514I Session 63 closed volume EL2273.
ANR0403I Session 63 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 64 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59711)).
ANR0403I Session 64 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 65 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59712)).
ANR0403I Session 65 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 66 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59713)).
ANR0403I Session 66 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 67 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59714)).
ANR0403I Session 67 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 68 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59715)).
ANR0403I Session 68 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 69 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59716)).
ANR0403I Session 69 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 70 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59717)).
ANR0403I Session 70 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 71 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59718)).
ANR0403I Session 71 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 72 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59719)).
ANR0403I Session 72 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 73 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59720)).
ANR0403I Session 73 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 74 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59721)).
ANR0403I Session 74 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 75 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59722)).
ANR0403I Session 75 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 76 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59723)).
ANR0403I Session 76 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 77 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59724)).
ANR0403I Session 77 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 78 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59725)).
ANR0403I Session 78 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 79 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59726)).
ANR0403I Session 79 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 80 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59727)).
ANR0403I Session 80 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR0406I Session 81 started for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664)
(Tcp/Ip tsm-server-2.cr.cnaf.infn.it(59728)).
ANR0403I Session 81 ended for node TSM-SERVER-2-CLIENT (DB2/LINUXX8664).
ANR4550I Full database backup (process 5) completed.
ANR0985I Process 5 for DATABASE BACKUP running in the BACKGROUND completed with
completion state SUCCESS at 02:02:04 PM.

This volume is defined with a different device class as I can see:

q vol EL2273 f=D

Volume Name: EL2273
Storage Pool Name: BABAR_POOL
Device Class Name: 9940B_CLASS
Estimated Capacity: 200.0 G
Scaled Capacity Applied:
Pct Util: 6.3
Volume Status: Filling
Access: Read/Write
Pct. Reclaimable Space: 0.0
Scratch Volume?: Yes
In Error State?: No
Number of Writable Sides: 1
Number of Times Mounted: 6
Write Pass Number: 1
Approx. Date Last Written: 09/21/2009 14:02:01
Approx. Date Last Read: 09/21/2009 13:26:44
Date Became Pending:
Number of Write Errors: 0
Number of Read Errors: 0
Volume Location:
Volume is MVS Lanfree Capable : No
Last Update by (administrator):
Last Update Date/Time: 09/21/2009 13:24:06
Begin Reclaim Period:
End Reclaim Period:
Drive Encryption Key Manager:


What I have to do to backup db in right volumes ?

Thanks